Gohei iwatsttbo



' To all whom it may concern:

I No Drawing.

' eorr'nr rwnrs'undor KYOTO, JAPAN.

. Specification of'Lettei-s Patent.

Be it known that I, GOHEI IwA'rsUnoY .manufacturer, a subject of the Emperor Ja an, residing at No. 24 Hontoro-Machi, Ta akura-Nishi-Iru, Matsubara-Dori, 'Shlmo-Kio-Ku, city' of Kyoto, Empire of Japan, have invented certain new and useful Im' rovements in Processes of Manufacturing aperLea-ves, of which the following is a specification. This invention relates to improvements in a method of finishin paper leaves, and particularly to a metho in which paper-1s to be 'coated with a substance imparting to the paper a desirable finish and permitting the embossing or shaping of the paper'so as to render the same suitable for use in artificial flowers and the like.

In the known method of finishing paper for this purpose it has been customary to coat the unfinished paper with a mixture of .glycerin and gelatin to which a suitable pig-' ment or die had been added. After the ap plication ofthis mass to the paper the same was subjected to an embossing or punching operation, the dies having been heated and I being applied to the unfinished, or rear, surface of the paper. The disadvantage of this method was that in the. embossing or pressing operation portions of the coating. dropped off the finished surface of the paper, so that this method resulted in considerable waste of; material.

It is an object of the present invention to avoid this waste and disadvantage by adding to the substances of which the mixture is formed an additional substance which imparts to the mixture the desired adhesive:

' ness, avoiding thereby the separation of parts of the coating from the paper surface.

In the known method of finishing paper for the purposes stated, a film of gelatin was applied to the leaf, and this film was then covered with glycerin containing a pigment, as, for instance, white zinc, when it was desired to finish the paper in white.- The application of the glycerin to the'gelatin film raocnss or MAnUrAcrUn NG PAPER nEAvns.

I Patented June 24, 1919'.

- Application filed Apri123, 1917. Serial No. 16;,056.

sometimes produced coating which cracked .or dropped off or was forced off in the embossing operation.-

According to the present method, a mixtur is made of the following ingredients, in the proportions stated:

Gelatin 3.2%

Glycerin v 1.4% White zinc or zinc flower 38.5% Magnesium carbonate 12.8% Calcium chlorid 0.6% Water 38.5%

The addition of the small amount of calcium'chloridto this mixture is sufficient to impart to this mixture the desired adhesiveness, so that even afterthe embossing operation the coating will remain on the paper leaf and will form a film thereon, eliminating the danger of cracking or dropping oil. The calcium chlorid forms a solvent for the glycerin and prevents the premature evaporation of the moisture in the glycerin, so that all of the substances contained in the mixture remain in that pasty condition in which it is desired to have them for the purpose of effecting the pressing or embossing.

Other solvents, as alkaline hydrates, may be used together with the other ingredients of the film forming material.

When the calcium chlorid is heated to about 200 centigrade,.the water contained in the mixture will b entirely evaporated without, however, deprivlng this mixture of its pasty consistency, which is necessary to make the impressions produced by the die upon the paper permanent impressions. This characteristic quality of the entire mass is not impaired even if the dies for the embossing operation or for the pressing are heated. Upon application of the heated dies to the paper, the glycerin and gelatin, owing to the presence of the calcium chlorid, are

again softened, if they should have become dry, and the entire mixture will then adhere to the paper and will not be transferred to that material which frequently is interposed between the dies and the surface to be and applying a hot die to the paper treated 10 Y finished. v I I in this Way. v

' Instead of the White'zine other pigments p In testimon whereof I afiix my signature may be use? for the film described. gin presence of two Witnesses. -5 WhatIcaimis: t v i A method of preparing paper for emboss T ing, which consists of applying a eoating Witnesses: ef a mixture of gelatin, glycerin, pigment, I W. EBITARAH,

and calcium chlorid fo'the Surface of paper I. SUKUI. 

